MATRIXSYNTH: Sequential Circuits' First Product, The Model 600 Sequencer and Complex Wave Generator


Thursday, September 25, 2014

Sequential Circuits' First Product, The Model 600 Sequencer and Complex Wave Generator


Brochure scan in via Brian Kehew.

This is a scan of a product flyer for the the Sequential Circuits Model 600 Sequencer and Complex Wave Generator.  It is first image of the  unit shared on the internet that I am aware of (click here for a search).  It was Sequential Circuits first product. Approximately only four units were made a couple of years prior to the Model 800.

An interesting side note is the aesthetics of the unit.  See if you can spot what's missing before you read on.  Sequential Circuits (along with Oberheim) started out creating products to work with existing synthesizers at the time.  So what's missing?  The trademark knobs and section outlines.  It wasn't until the Model 700 programmer in 1977 that we begin to see what was to become Sequential Circuits trademark look.   Another interesting side note is that the model numbers for Sequential Circuits first three products where not actually sequential, the Model 600 (1974), the Model 800 (1975), and the Model 700 (1977).  They broke out of the "Model" line for the name with the Prophet-5 (which was the Model 1000) in 1978, but came back once with the Model 64 Sequencer for the Commodore 64 in 1983.  One final thing I thought was kind of neat was that the final bullet point in the brochure called out how the Model 600 made for an excellent teaching aid for electronic music.  Indeed.

The following is the description from the scan (note the reference to the unit as a teaching aid):

"MODEL 600 SEQUENCER and COMPLEX WAVE GENERATOR

As A Sequencer -

- Three rows of 16 controls, each row with its own output.
- Built-in sequential control for up to 48 note sequences by turning only one knob.
- Voltage controlled clock can be set internally and/or controlled externally.
Patch one output row back to the VCO input, and the length of each note can be precisely controlled.
- Can sequence slower than one pulse every 30 seconds through and beyond the entire audio range.
- Any one level can be skipped by simply throwing its corresponding switch; hence, any combination of levels can be set.
- Direction switch for forward or backwards direction.
- Handy three-way mixers at the output for easy patch changes.
- LED (light emitting diode) visual display.
- Switch trigger output compatible with Moog synthesizers, including the Mini-Moog.
By flipping one switch, gate and trigger outputs can be obtained for other synthesizers, suck as the ARP 2600.

As A Complex Waveform Generator -

- The quality of the Model 600 makes it possible to be used as a complex waveform generator, with up to 48 segments constructing the composite waveform. Below is an oscilloscope plot of a 48 segment sine wave at 300 hertz, with the lower wave-form the output after being run through a low-pass filter.
- One can easily see the possibility for complete waveform control. With an internal adjustment, the external input can be adjusted to the standard 1 volt/octave; hence, the sequencer can actually be played as an oscillator by any keyboard.
- This capability makes the Model 600 an excellent teaching aid for electronic music, as well as a quality waveform generator for the perfectionist synthesizer performer."

3 comments:

  1. Isn't the Prophet 5 the Model 1000?

    ReplyDelete
  2. Ah, interesting point. I guess I was referring more to the product name on the front. I'll clarify in the post. Great catch!

    ReplyDelete
  3. It's interesting how this Sequencer (start of SEQUENTIAL circuits) is never mentioned anywhere. Had I not found this brochure about 20+ years ago, I wouldn't have known it existed. I was at Dave Smith's house once in the 80s and he had one of almost every product there, but no 600 Sequencer! Wonder where they all went?

    ReplyDelete

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